Stop-motion device for automatic reshuttling-looms.



APPLICATION FILED MAYS, 1910.

Patented Nov. 29, 1910.

3 BHEETS-SEEET 1.

J. ROSTRON. STOP MOTION DEVICE POR AUTOMATIC BESHUTTLING Looms.

APPLICATION FILED MAY 3, 1910. 977,329. Patented Nov. 29, 1910.

3 SHEBTS-SHEET 2.

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J. ROSTRON;

STOP MOTION DEVICE FOR AUTOMATIC RESHUTTLING LOOMS.

APPLICATION HLEDMAYa, 1910.

977,329. 4 Patented N0v.29, 1910.

3 SHEETS-SHEET 3.

Q, .lz

JWM/y 2% 4 Wy Af www JAMES BOSTRON, OF MANCHESTER, ENGLAND.

STOP-MOTION DEVICE FOR AUTOMATIC RESHUTTLING-LOOMS.

Specification of Letters Patent.

Patented Nov. 29, 1910.

Application filed May, 1910. Serial No. 559,198.

To all whom 112i 'may concern:

Be it known that I, JAMES RosrRoN, a subject of the King of Great Britain and Ireland, and resident of Manchester, England, have invented certain new and usefulV Improvements in Stop-vIotion Devices for Automatic Reshuttling-Looms, of which the following is a specification.

This invention refers to and consists of an improved arrangement of stop-motion devices for use with looms tted with automatic reshuttling mechanism. Its object 1s to stop the loom when a newly inserted shuttle fails to lay the weft at the first pick and before a further shuttle can be inserted, and thus guard against the rapid emptying of the shuttle-holding magazine.

Upon the accompanying drawings Figure 1 illustrates a transverse section of the breast beam of a loom and a side elevation of the improved stop-motion devices and also of certain take-up control mechanism. Fig. 2 illustrates a front elevation of Fig. 1 (in part). Fig. 3 illustrates a like view to Fig. 1 but showing the working parts in the position they occupy immediately after a shuttle has been inserted in the loom and while such shuttle is making its iirst traverse across the loom.

According to the invention a link bar is pivotally connected to the weft-fork holder lo by a pin Z. This link bar y' extends forwardly toward the loom front and upon its underface is formed with a notch or shoulder j. At such point the bar overlies a lateral stud 111, carried by an upstanding lever arm 1L connected with the cross-rod o of the reshuttling devices. Such cross-rod may be the same as that mentioned in the specication of Letters Patent 938,276.

When the weft fails and the weft fork fo engages the hammer lever g in the usual way the link bar y' is also moved by the hammer lever, thereby causing its notched end to press upon the stud fm, and rock the cross-rod, thereby operating the reshuttling mechanism and causing a new shuttle to be inserted in the loom.

For the purpose of preventing the insertion of another shuttle should the weft fail to be laid by the first shuttle, the said link bar j is fitted with a depending arm 1, the free end of which lies in the plane of a short lever s, mounted upon a relatively fixed stud t on the loom frame. Upon or in one with this stud t is a short lever arm s which extends upward and forwardly in the path of the hammer lever g. The lever s is provided with a shoulder S2 designed to engage the arm 1 for the purpose of raising, under the force of a weight s3, the link arm j as shown in Fig. 3.

Upon the usual loom stopping lever u is a pivoted plate-like extension u which normally extends over but lies clear of the for* ward end of the link bar j in which is a shoulder ji.

With the forward movement of the hammer lever and link bar y' to operate the lever arm 11o, the depending arm 1f' moves over the top face of the lever s and beyond the shoulder s2. As the hammer lever and link y' make their return movement the shoulder s2 retards the movement of the arm 1a and as a result the link j is tilted up about its fulcrum, see Fig. 3, thereby bringing the shoulder jz of the link bar opposite the edge of the extension u. The extension u being pivoted allows the link bar j to move upward and backward, the plate falling into its normal position as soon as the shoulder of the bar has passed below it. With the new weft properly laid across the loom the weft fork is made free from the hammer lever Q and such lever making its next forward movement presses against the lever arm s and frees the arm 1a from the lever s, the link bar j thus falling down into its normal position, but should, however, the new weft not be properly laid, the weft fork again engages the hammer lever, and, as the hammer lever moves forward, it moves the link bar j in its raised position against the extension u of the loom stopping lever, thereby stopping the loom. To restart the loom the attendant frees the arm 1" from the notch of the lever s by say raising the weight s3, and also, if necessary, by freeing the weft fork from the hammer lever. Vith the loom restarted and the weft properly laid, the hammer lever has no eect on the link bar until the weft again fails, and the loom will not be sto ped by the automatic devices until the we t again fails with the insertion of a newly-filled shuttle.

To prevent thin places in the cloth when the weft fails the pawl o, Fig. l, of the takeup roller wheel fw is raised 'clear of the wheel during the period of the failure of the weft. This is eected by the lever arm 11, loose on the cross rod o and the short lever arm 11,2 fast on the cross-rod and provided with a pin n3 which extends below the lever arm n, see Fig. 1.

What I claim is l. In automatic stop motion devices for use with looms fitted With reshuttling mechanism, and in combination With the usual hammer lever and weft fork, a weft Jfork holder, a link bar pivotally connected with the holder and having a shoulder upon its upper and under edges respectively, a stud forming part of automatic reshuttling mechanism upon which the link bar normally rests and against which the shoulder in its under edge normally lies, a fixed depending arm on the said link bar, a loom stopping lever, a plate-like extension pivoted to the loom stopping lever and overlying the said link bar, a lever having a shoulder on the upper edge of wone arm adapted to be engaged by the depending arm and a Weight on the other arm7 a stud carrying such lever and a cranked lever arm connected to such stud and adapted to be engaged by the hammer lever, substantially as described.

2. In automatic stop motion devices for use with looms fitted With reshuttling mechanism, and in combination With the usual hammer lever and weft fork, a weft fork holder, a link bar pivotally connected with the holder and having a shoulder upon its under and upper edges respectively, a stud forming part of automatic reshuttlingmechanism upon which the link bar normally rests and against which the shoulder in its under edge normally lies, means for raising the free end or the link bar When the link bar moves in one direction, a loom stopping lever and an extension piece pivoted to such lever and adapted to be engaged by the upper shoulder of the link bar when the saine is in raised position and means for lowering the link bar When the weft fork holder remains stationary, as set forth.

In Witness whereof I have hereunto set my hand in the presence of two Witnesses.

JAMES ROSTRGN.

IVitnesses:

JAS. STEWART BRoADFooT, F. C. PENNINGTON. 

